Expedition 369 summary

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doi: 10.14379/iodp.proc.369.101.2019
Author(s): Huber, Brian T.; Hobbs, Richard W.; Bogus, Kara A.; Batenburg, Sietske J.; Brumsack, Hans-Jürgen; Guerra, Rodrigo do Monte; Edgar, Kirsty M.; Edvardsen, Trine; Garcia Tejada, Maria Luisa; Harry, Dennis L.; Hasegawa, Takashi; Haynes, Shannon J.; Jiang Tao; Jones, Matthew M.; Kuroda, Junichiro; Lee, Eun Young; Li Yongxiang; MacLeod, Kenneth G.; Maritati, Alessandro; Martinez, Mathieu; O'Connor, Lauren K.; Petrizzo, Maria Rose; Quan, Tracy M.; Richter, Carl; Riquier, Laurent; Tagliaro, Gabriel T.; Wainman, Carmine C.; Watkins, David K.; White, Lloyd T.; Wolfgring, Erik; Xu Zhaokai
International Ocean Discovery Program, Expedition 369 Scientists, College Station, TX
Author Affiliation(s): Primary:
National Museum of Natural History, Washington, DC, United States
Other:
University of Durham, United Kingdom
Texas A&M University, United States
University of Oxford, United Kingdom
Carl von Ossietzky Universität Oldenburg, Germany
Volume Title: Proceedings of the International Ocean Discovery Program; Australia Cretaceous climate and tectonics; Expedition 369 of the R/V JOIDES Resolution, Hobart, Australia, to Fremantle, Australia; Sites U1512-U1516, 26 September-26 November 2017
Volume Author(s): Hobbs, Richard W.; Huber, Brian T.; Bogus, Kara A.; Batenburg, Sietske J.; Brumsack, Hans-Jürgen; Guerra, Rodrigo do Monte; Edgar, Kirsty M.; Edvardsen, Trine; Garcia Tejada, Maria Luisa; Harry, Dennis L.; Hasegawa, Takashi; Haynes, Shannon J.; Jiang Tao; Jones, Matthew M.; Kuroda, Junichiro; Lee, Eun Young; Li Yongxiang; MacLeod, Kenneth G.; Maritati, Alessandro; Martinez, Mathieu; O'Connor, Lauren K.; Petrizzo, Maria Rose; Quan, Tracy M.; Richter, Carl; Riquier, Laurent; Tagliaro, Gabriel T.; Wainman, Carmine C.; Watkins, David K.; White, Lloyd T.; Wolfgring, Erik; Xu Zhaokai
Source: Proceedings of the International Ocean Discovery Program; Australia Cretaceous climate and tectonics; Expedition 369 of the R/V JOIDES Resolution, Hobart, Australia, to Fremantle, Australia; Sites U1512-U1516, 26 September-26 November 2017, Richard W. Hobbs, Brian T. Huber, Kara A. Bogus, Sietske J. Batenburg, Hans-Jürgen Brumsack, Rodrigo do Monte Guerra, Kirsty M. Edgar, Trine Edvardsen, Maria Luisa Garcia Tejada, Dennis L. Harry, Takashi Hasegawa, Shannon J. Haynes, Jiang Tao, Matthew M. Jones, Junichiro Kuroda, Eun Young Lee, Li Yongxiang, Kenneth G. MacLeod, Alessandro Maritati, Mathieu Martinez, Lauren K. O'Connor, Maria Rose Petrizzo, Tracy M. Quan, Carl Richter, Laurent Riquier, Gabriel T. Tagliaro, Carmine C. Wainman, David K. Watkins, Lloyd T. White, Erik Wolfgring and Xu Zhaokai; International Ocean Discovery Program, Expedition 369 Scientists, College Station, TX. Proceedings of the International Ocean Discovery Program, Expedition Reports, Vol.369, 25p. Publisher: International Ocean Discovery Program, Washington, DC, United States. ISSN: 2377-3189 CODEN: IDSDA6
Note: In English. 97 refs.; illus., incl. 1 table, sketch map
Summary: The tectonic and paleoceanographic setting of the Great Australian Bight (GAB) and the Mentelle Basin (adjacent to Naturaliste Plateau) offered an opportunity to investigate Cretaceous and Cenozoic climate change and ocean dynamics during the last phase of breakup among remnant Gondwana continents. Sediment recovered from sites in both regions during International Ocean Discovery Program Expedition 369 will provide a new perspective on Earth's temperature variation at subpolar latitudes (60°-62°S) across the extremes of the mid-Cretaceous hot greenhouse climate and the cooling that followed. Basalts and prebreakup sediments were also recovered and will provide constraints regarding the type and age of the Mentelle Basin basement and processes operating during the break up of Gondwana. The primary goals of the expedition were to • Investigate the timing and causes for the rise and collapse of the Cretaceous hot greenhouse climate and how this climate mode affected the climate-ocean system and oceanic biota; • Determine the relative roles of productivity, ocean temperature, and ocean circulation at high southern latitudes during Cretaceous oceanic anoxic events (OAEs); • Investigate potential source regions for deep-water and intermediate-water masses in the southeast Indian Ocean and how these changed during Gondwana breakup; • Characterize how oceanographic conditions at the Mentelle Basin changed during the Cenozoic opening of the Tasman Gateway and restriction of the Indonesian Gateway; and • Resolve questions on the volcanic and sedimentary origins of the Australo-Antarctic Gulf and Mentelle Basin and provide stratigraphic control on the age and nature of the prebreakup successions. Hole U1512A in the GAB recovered a 691 m thick sequence of black claystone ranging from the lower Turonian to the lower Campanian. Age control is primarily based on calcareous nannofossils, but the presence of other microfossil groups provided consistent low-resolution control. Despite the lithologic uniformity, long- and short-term variations in natural gamma radiation and magnetic susceptibility show cyclic alternations that suggest an orbital control of sediment deposition, which will be useful for developing an astrochronology for the sequence. Sites U1513, U1514, U1515, and U1516 were drilled in water depths between 850 and 3900 m in the Mentelle Basin and penetrated 774, 517, 517, and 542 meters below seafloor, respectively. Under a thin layer of Pleistocene to upper Miocene sediment, Site U1513 cored a succession of Cretaceous units from the Campanian to the Valanginian, as well as a succession of basalts. Site U1514 sampled an expanded Pleistocene to Eocene sequence and terminated in the upper Albian. The Cenomanian to Turonian interval at Site U1514 is represented by deformed sedimentary rocks that probably represent a detachment zone. Site U1515 is located on the west Australian margin at 850 m water depth and was the most challenging site to core because much of the upper 350 m was either chert or poorly consolidated sand. However, the prebreakup Jurassic(?) sediments interpreted from the seismic profiles were successfully recovered. Site U1516 cored an expanded Pleistocene, Neogene, and Paleogene section and recovered a complete Cenomanian/Turonian boundary interval containing five layers with high organic carbon content.
Year of Publication: 2019
Research Program: IODP Integrated Ocean Drilling Program
IODP2 International Ocean Discovery Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Biostratigraphy; Boreholes; Cenozoic; Chemostratigraphy; Cores; Correlation; Expedition 369; Foraminifera; Great Australian Bight; IODP Site U1512; IODP Site U1513; IODP Site U1514; IODP Site U1515; IODP Site U1516; Indian Ocean; International Ocean Discovery Program; Lithofacies; Lithostratigraphy; Magnetostratigraphy; Mentelle Basin; Microfossils; Nannofossils; Paleo-oceanography; Paleogeography; Physical properties; Pleistocene; Quaternary; Sedimentary rocks; Tertiary; Well logs
Coordinates: S340138 S340138 E1275746 E1275746
S334737 S334737 E1122908 E1122908
S330714 S330714 E1130529 E1130529
S331611 S331611 E1141922 E1141922
S342055 S342055 E1124758 E1124758
Record ID: 2019050623
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.